Thanks. I have always loved these rims, even before I decided on the X1. These in particular are 19" M5 replica wheels in satin black off Ebay. I put the same size tires that came with my 19" M-sport rims...225 in front, 255 in back. I had these roadforce balanced locally and they did not need a lot of weights to add--always a good sign in terms of quality. Indeed, they are very smooth on the highway. Offsets are ET37 in front, ET33 in rear. I like wheels flush, but looking down, I do not like the top of the rim to exceed the lip of the fender above the rim: I added 12mm spacers in front but nothing for the rear.